Game concept · All Under Heaven
Dynastic Cycle
The game also links it as Dynastic Cycle's.
From the game's encyclopedia
The Dynastic Cycle depicts the socio-political status of the Great Empire of China, which flows through Dynastic Cycle Eras of stability, instability, and chaos.
Key to the Dynastic Cycle is the Mandate of Heaven, a form of Legitimacy held by the Emperor. If it is ever lost, the Great Empire of China will shatter - until it is again united by someone worthy to be the Son of Heaven.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Dynastic Cycle is an entry of Crusader Kings III's in-game encyclopedia (All Under Heaven). The game explains it: "The Dynastic Cycle depicts the socio-political status of the Great Empire of China, which flows through Dynastic Cycle Eras of stability, instability, and chaos." It is part of Situation. It covers Dynastic Cycle Era, Dynastic Cycle Era Type, Stable Era, Unstable Era and Chaotic Era. The game also links it as Dynastic Cycle's. Patch 1.20.1.2, from game/common/game_concepts/tgp_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/tgp_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.